A very sizable wage gap exists between the U.S. and Mexico. In 1994, the North American Free Trade Agreement was implemented in the hopes of increasing wages in Mexico, among other economic goals. However, since this time there has been little evidence of wage equalization between the economies of the U.S. and Mexico.

What push factor is a main reason for Mexican emigration to other nations?
A) lower wages
B) higher wages
C) free education
D) warmer climate